I'm preaching to the choir, I know, but more evidence for our evangelizing the benefits of bike commuting:
http://www.metropolismag.com/cda/story.php?artid=2353
(And sorry for church metaphor.)
In a nutshell: sprawl and car-dependence is the root cause of America's chronic health problems and why we see such poor returns on the money we spend on health care. (I'd say a lack of insurance deterring people from preventative care is as important or nearly so; some hospitals have begun providing free preventative care to patients because it's cheaper than the emergency services the patients needed.)
The only exercise I get is 40 minutes of waking 5 days a week: train to office, office to train, plus 2 miles of bike commuting (as soon as I find the spare bike lock key --- grrr). And that's enough to keep the weight off and the blood pressure normal.
--SJ



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(Sorry... I just couldn't resist.)

